Bonneville Dam
Saturday October 31, 2026
| Hour | Total Outflow kcfs | Generation Flow kcfs | Spill kcfs | PH 1 Forebay Elevation | Tailwater Elevation | Average Head | Project Forebay Elevation | Stevenson Gage Elevation | Project Tailwater Elevation |
|---|
| 1 | 79.10 | 64.30 | 2.40 | 75.80 | 9.60 | 66.20 | 75.60 | 76.00 | 9.50 |
| 2 | 78.80 | 64.00 | 2.40 | 75.80 | 9.40 | 66.40 | 75.70 | 76.00 | 9.30 |
| 3 | 78.50 | 63.70 | 2.40 | 75.70 | 9.10 | 66.60 | 75.60 | 76.00 | 9.00 |
| 4 | 78.70 | 63.90 | 2.40 | 75.70 | 9.00 | 66.70 | 75.60 | 76.00 | 8.90 |
| 5 | 78.90 | 64.10 | 2.40 | 75.70 | 8.70 | 67.00 | 75.60 | 76.00 | 8.60 |
| 6 | 78.60 | 63.80 | 2.40 | 75.80 | 8.50 | 67.30 | 75.60 | 76.00 | 8.40 |
| 7 | 78.30 | 63.50 | 2.40 | 75.70 | 8.20 | 67.50 | 75.60 | 76.00 | 8.20 |
| 8 | 79.80 | 65.00 | 2.40 | 75.90 | 8.10 | 67.80 | 75.80 | 76.00 | 8.00 |
| 9 | 79.90 | 65.10 | 2.40 | 76.10 | 7.90 | 68.20 | 75.90 | 76.20 | 7.70 |
| 10 | 79.10 | 64.30 | 2.40 | 76.10 | 7.70 | 68.40 | 76.00 | 76.30 | 7.50 |
| 11 | 79.60 | 64.80 | 2.40 | 76.10 | 7.60 | 68.50 | 76.00 | 76.30 | 7.50 |
| 12 | 79.10 | 64.30 | 2.40 | 76.20 | 7.80 | 68.40 | 76.10 | 76.40 | 7.60 |
| 13 | 79.30 | 64.50 | 2.40 | 76.20 | 8.10 | 68.10 | 76.00 | 76.40 | 8.00 |
| 14 | 80.00 | 65.20 | 2.40 | 76.10 | 8.30 | 67.80 | 76.00 | 76.40 | 8.20 |
| 15 | 80.80 | 66.00 | 2.40 | 76.00 | 8.30 | 67.70 | 75.90 | 76.20 | 8.10 |
| 16 | 89.60 | 74.80 | 2.40 | 75.90 | 8.40 | 67.50 | 75.80 | 76.20 | 8.60 |
| 17 | 89.90 | 75.10 | 2.40 | 75.90 | 8.30 | 67.60 | 75.80 | 76.20 | 8.50 |
| 18 | 89.90 | 75.10 | 2.40 | 76.10 | 8.20 | 67.90 | 76.00 | 76.30 | 8.40 |
| 19 | 89.80 | 75.00 | 2.40 | 76.00 | 8.10 | 67.90 | 75.80 | 76.20 | 8.30 |
| 20 | 90.10 | 75.30 | 2.40 | 76.00 | 8.00 | 68.00 | 75.90 | 76.30 | 8.30 |
| 21 | 89.60 | 74.80 | 2.40 | 75.60 | 8.10 | 67.50 | 75.60 | 76.30 | 8.40 |
| 22 | 90.10 | 75.30 | 2.40 | 76.00 | 8.30 | 67.70 | 75.90 | 76.30 | 8.60 |
| 23 | 98.90 | 84.10 | 2.40 | 75.90 | 9.40 | 66.50 | 75.80 | 76.30 | 9.70 |
| 24 | 91.60 | 76.80 | 2.40 | 76.10 | 9.60 | 66.50 | 76.00 | 76.40 | 9.80 |
| 1 | 90.70 | 75.90 | 2.40 | 76.00 | 9.70 | 66.30 | 75.80 | 76.30 | 9.90 |
|
| AVG | 83.95 | 69.15 | 2.40 | 75.94 | 8.50 | 67.44 | 75.82 | 76.20 | 8.52 |
|
| MAX | 98.90 | 84.10 | 2.40 | 76.20 | 9.70 | 68.50 | 76.10 | 76.40 | 9.90 |
| MIN | 78.30 | 63.50 | 2.40 | 75.60 | 7.60 | 66.20 | 75.60 | 76.00 | 7.50 |
| |
Powerhouse 1 |
Powerhouse 2 |
Project |
| Hour | Generation Flow kcfs | Forebay Elevation | Forebay Elevation | Generation Flow kcfs | Spillway Gates in Use | Miscellaneous Flow kcfs* |
|---|
| 1 | 0.00 | 75.8 | 75.6 | 64.30 | 2 | 12.4 |
| 2 | 0.00 | 75.8 | 75.7 | 64.00 | 2 | 12.4 |
| 3 | 0.00 | 75.7 | 75.6 | 63.70 | 2 | 12.4 |
| 4 | 0.00 | 75.7 | 75.6 | 63.90 | 2 | 12.4 |
| 5 | 0.00 | 75.7 | 75.6 | 64.10 | 2 | 12.4 |
| 6 | 0.00 | 75.8 | 75.6 | 63.80 | 2 | 12.4 |
| 7 | 0.00 | 75.7 | 75.6 | 63.50 | 2 | 12.4 |
| 8 | 0.00 | 75.9 | 75.8 | 65.00 | 2 | 12.4 |
| 9 | 0.00 | 76.1 | 75.9 | 65.10 | 2 | 12.4 |
| 10 | 0.00 | 76.1 | 76.0 | 64.30 | 2 | 12.4 |
| 11 | 0.00 | 76.1 | 76.0 | 64.80 | 2 | 12.4 |
| 12 | 0.00 | 76.2 | 76.1 | 64.30 | 2 | 12.4 |
| 13 | 0.00 | 76.2 | 76.0 | 64.50 | 2 | 12.4 |
| 14 | 0.00 | 76.1 | 76.0 | 65.20 | 2 | 12.4 |
| 15 | 0.00 | 76.0 | 75.9 | 66.00 | 2 | 12.4 |
| 16 | 7.80 | 75.9 | 75.8 | 67.00 | 2 | 12.4 |
| 17 | 8.20 | 75.9 | 75.8 | 66.90 | 2 | 12.4 |
| 18 | 8.10 | 76.1 | 76.0 | 67.00 | 2 | 12.4 |
| 19 | 8.10 | 76.0 | 75.8 | 66.90 | 2 | 12.4 |
| 20 | 8.20 | 76.0 | 75.9 | 67.10 | 2 | 12.4 |
| 21 | 8.10 | 75.6 | 75.6 | 66.70 | 2 | 12.4 |
| 22 | 8.20 | 76.0 | 75.9 | 67.10 | 2 | 12.4 |
| 23 | 17.20 | 75.9 | 75.8 | 66.90 | 2 | 12.4 |
| 24 | 8.90 | 76.1 | 76.0 | 67.90 | 2 | 12.4 |
| 1 | 8.60 | 76.0 | 75.8 | 67.30 | 2 | 12.4 |
|
| AVG | 3.66 | 75.9 | 75.8 | 65.49 | 2 | 12.4 |
|
| MAX | 17.20 | 76.2 | 76.1 | 67.90 | 2 | 12.4 |
| MIN | 0.00 | 75.6 | 75.6 | 63.50 | 2 | 12.4 |
* Miscellaneous Flow includes fish ladders, PH1 sluiceway, navigation lock,
PH2 DSM, UMT, and PH2 corner collector (B2CC). When all routes are in
operation (March-August), total Misc Flow will be ~12.4 kcfs. Flow through
the B2CC is ~5 kcfs, so fluctuations of +/-5 kcfs at any time of year
indicate the B2CC is open/closed.